var r = 150;
var pi = Math.PI;
var a=-1;
function drehen()
{
a++;
star1.style.left=(r * Math.cos(a*(pi/180))) + 335;
star1.style.top=(r * Math.sin(a*(pi/180))) + 215;
star2.style.left=(r * Math.cos((a+30)*(pi/180))) + 335;
star2.style.top=(r * Math.sin((a+30)*(pi/180))) + 215;
star3.style.left=(r * Math.cos((a+60)*(pi/180))) + 335;
star3.style.top=(r * Math.sin((a+60)*(pi/180))) + 215;
star4.style.left=(r * Math.cos((a+90)*(pi/180))) + 335;
star4.style.top=(r * Math.sin((a+90)*(pi/180))) + 215;
star5.style.left=(r * Math.cos((a+120)*(pi/180))) + 335;
star5.style.top=(r * Math.sin((a+120)*(pi/180))) + 215;
star6.style.left=(r * Math.cos((a+150)*(pi/180))) + 335;
star6.style.top=(r * Math.sin((a+150)*(pi/180))) + 215;
star7.style.left=(r * Math.cos((a+180)*(pi/180))) + 335;
star7.style.top=(r * Math.sin((a+180)*(pi/180))) + 215;
star8.style.left=(r * Math.cos((a+210)*(pi/180))) + 335;
star8.style.top=(r * Math.sin((a+210)*(pi/180))) + 215;
star9.style.left=(r * Math.cos((a+240)*(pi/180))) + 335;
star9.style.top=(r * Math.sin((a+240)*(pi/180))) + 215;
star10.style.left=(r * Math.cos((a+270)*(pi/180))) + 335;
star10.style.top=(r * Math.sin((a+270)*(pi/180))) + 215;
star11.style.left=(r * Math.cos((a+300)*(pi/180))) + 335;
star11.style.top=(r * Math.sin((a+300)*(pi/180))) + 215;
star12.style.left=(r * Math.cos((a+330)*(pi/180))) + 335;
star12.style.top=(r * Math.sin((a+330)*(pi/180))) + 215;
window.setTimeout ('drehen()', 35);
}